In a narrow valley in central Japan, on a morning thick with fog, two vast armies of samurai met to decide who would rule a country. Sekigahara lasted a single day, and its outcome shaped Japan for the next two and a half centuries.
A country up for grabs
The great unifier Hideyoshi had died, leaving a young heir and a council of powerful lords. Two of them, Tokugawa Ieyasu in the east and Ishida Mitsunari in the west, gathered rival coalitions, and all of Japan was drawn toward a single reckoning at the crossroads of Sekigahara.
The armies in the fog
On the morning of 21 October 1600, tens of thousands of men faced each other in the mist. On paper the Western coalition held a strong position, wrapped around the smaller Eastern army. When the fog lifted and the fighting began, it was ferocious and, for hours, evenly matched.
The betrayal
The Western coalition was held together by loyalty that some of its lords did not feel. On a hill sat Kobayakawa Hideaki with a large force, secretly in contact with Ieyasu. At the critical moment he turned his men against his own side, charging down into the Western flank. Other waverers followed him.
Collapse
The Western army, betrayed from within, folded. What had been a balanced battle became a rout, and by afternoon Ieyasu had won.
250 years of peace
Sekigahara made Tokugawa Ieyasu the master of Japan. Within a few years he was named shogun, founding a dynasty that would rule from Edo for over 250 years, an age of peace and isolation that shaped modern Japan. One misty morning, one betrayal, and the course of a nation was set.